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Finding the Fourth Proportional to 87,694.38, 121,018.10 and 47,408.18

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Solution

The fourth proportional to 87,694.38, 121,018.10 and 47,408.18 is: 65,423.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,694.38 : 121,018.10 = 47,408.18 : x
  2. Step 2: Convert to fraction form
    87,694.38/121,018.10 = 47,408.18/x
  3. Step 3: Cross multiply
    87,694.38x = 121,018.10 × 47,408.18
  4. Step 4: Simplify right side
    87,694.38x = 5,737,247,868.06
  5. Step 5: Solve for x
    x = 5,737,247,868.06/87,694.38
  6. Step 6: Final answer
    x = 65,423.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.